Mean anticyclonicity for the 29-year period (1965-1993) for each season and year is presented for the area centred on eastern Australasia. It is evident that mean anticyclonicity for winter is markedly different compared to other seasons. Maps showing correlations of annual and seasonal anticyclonicity with the Southern Oscillation Index are presented and discussed. These show there are seasonal variations in the relationship between anticyclonicity and the Southern Oscillation with winter showing the greatest variation compared to other seasons. Relationships between Australian rainfall and anticyclonicity across three areas at Australian longitudes are also presented and discussed. Although anticyclonicity across these areas is not independent of the Southern Oscillation, in general for the same season anticyclonicity from different areas has well-defined relationships with rainfall across different parts of Australia.
Nowak et al. (Mon,) studied this question.